Global Patent Index - EP 2239452 A1

EP 2239452 A1 20101013 - Injection Nozzle

Title (en)

Injection Nozzle

Title (de)

Einspritzdüse

Title (fr)

Buse à injection

Publication

EP 2239452 A1 20101013 (EN)

Application

EP 09156674 A 20090330

Priority

EP 09156674 A 20090330

Abstract (en)

An injection nozzle (20) for an internal combustion engine comprises a nozzle body (22) provided with a bore (24) within which a valve needle (23) is movable along a primary valve needle axis (A-A), the valve needle (23) being engageable with a valve seating (25) defined by the bore (24) to control fuel delivery through a nozzle outlet, and including a first region (36), a second region (38) and a seating region (33) defined by a transition between the first and second regions (36, 38) which seats against the valve seating (25) when the injection nozzle (20) is in a non-injecting state. A relieved region (40) is disposed upstream of the seating region (33), the relieved region (40) and one of the valve seating (25) and the first region (36) defining an anti-cavitation volume (50) therebetween when the injection nozzle (20) is in the non-injecting state. The valve needle (23) and the valve seating (25) together define a restriction (47) upstream of the relieved region (40) for restricting the flow of fuel into and out of the anti-cavitation volume (50) when the injection nozzle (20) is in the non-injecting state in order to reduce pressure wave activity upstream of the seating region (33).

IPC 8 full level

F02M 61/16 (2006.01); F02M 61/18 (2006.01)

CPC (source: EP)

F02M 61/16 (2013.01); F02M 61/18 (2013.01); F02M 61/1866 (2013.01); F02M 61/1873 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA RS

DOCDB simple family (publication)

EP 2239452 A1 20101013

DOCDB simple family (application)

EP 09156674 A 20090330